I have 2 servers in my network which I expose to the internet via port forwarding.
One of these devices used to have the internal IP of 192.168.0.6, but I have recently changed it's IP address to 192.168.0.5.
Today I opened the port forwarding page on the router and deleted the old rule and tried to create a new rule for the new IP address.
When entering the IP address, the router's script logic tells me that 192.168.0.5 is not a valid IP address!
As such, I cannot add the new rule which means my service is no longer visible to the Internet.
I tried speaking with VM tech support, but the people I dealt with obviously don't have a clue about port forwarding because they kept telling me that my routers IP address is 192.168.0.1 - yeah, they were that good!